Close all background programs. Why do mobile phones still take up so much memory?

The mobile phone needs a certain amount of memory to run the whole Android system, and some system programs and third-party programs will also start by themselves, so it takes up more memory, so the memory occupancy rate is higher after booting.

If you use a vivo mobile phone, I suggest you always clear the running memory of the mobile phone with one click, and enter I Management-(Application Management/Software Management)-Permission Management-self-startup and shut down unnecessary self-startup software.